(CHANGE CHEMICALLY) [verb] - to (cause to) change chemically through the action of living substances, such as yeast or bacteriaYoghurt is obtained by fermenting milk with bacteria. [T]You make wine by leaving grape juice to ferment until all the sugar has turned to alcohol. [I]
FERMENT
Meaning of FERMENT in English
Cambridge English vocab. Кембриджский английский словарь. 2012